Major issues

The pub/_work_area directory is not protected by the documented httpd config file for TWiki. The default TWiki does not keep anything in this directory but some plugins may keep private information in this area. If your site is configured by .htaccess files you are OK. If you use an apache config file add this to your twiki apache config file (assuming /var/www/twiki as your twiki rootdirectory)<Directory "/var/www/twiki/pub/_work_areas"> deny from all<Directory>The ApacheConfigGenerator has been updated so it creates a protected work area for the plugins.

Minor issues

Item3510 - CommentPlugin templates newline issue. With TWiki 4.1.X %TMPL:DEF.. no longer removes leading white space. This influences templates including those used by CommentPlugin. It is simple to fix. If your existing COMMENT based application adds unwanted newlines, simple delete the new line after the %TMPL:DEF..% tag so that your template starts on the same line as %TMPL:DEF..%

Item3471 - When trying to create a new topic using Jump field or URL, the top creation feature broken when a web does not have the WebTopicCreator topic. Work-around for upgraders: Simply copy the WebTopicCreator.txt file from the TWiki web into each of your old Web directories. Then it all works fine.

Discussion

Not sure what is that topic about now?!? I ended up there as I was looking for the show stopper concerning 4.2 but that topic tittle suggests it applies to 4.1 however in the paragraph concerning 4.1.2 it mention a bug concerning 4.2 !?! I guess it's just work in progress. BTW AndersHolm as far as I'm concerned 4.1.2 provided genuine benefits from 4.1.1. See TWikiHistory.